EUVD-2026-74004
GHSA-89v2-4jp2-7ch8
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only attack with low-privilege requirement; full C/I/A after escalation; scope unchanged as the escalation occurs within Android's privilege model.
Primary rating from Vendor (android).
CVSS VectorVendor: android
Lifecycle Timeline
5DescriptionCVE.org
In read_boot_region of fsck.c, there is a possible out of bounds read due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
AnalysisAI
Heap buffer overflow in the read_boot_region function of Android's filesystem check utility (fsck.c) allows a local, low-privileged process to escalate privileges with full system impact. The flaw spans Android 14 through 17 (including QPR2 branches) and was disclosed in Google's September 2026 Android Security Bulletin. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already have a low-privilege execution context on the target Android device (consistent with PR:L in the CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 (High) vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H accurately reflects the local-only attack surface but correctly scores full C/I/A impact post-escalation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Android security patches released in the 2026-09-01 Android Security Bulletin, available at https://source.android.com/docs/security/bulletin/2026/2026-09-01. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Android devices running versions 14, 15, 16, or 17 in your organization, with particular focus on enterprise-managed devices and those running mission-critical services. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Privilege Escalation
View allShare
External POC / Exploit Code
Leaving vuln.today